peters



(Model.) SSheets-Sheetl.

J. MVCASE. Flour Bolt.

No. 240,964. Patented May 3, |881.

N- PETERS, PHOTO-LITHOGRAPHER. WASHXNGTON. D C.

(Model.)

Y 1 3 Sheets-Sheet 2 J; M. CASE.

T'loury Bolt..

,Patented May 3,18 8l.v y

3. t. e nu h s s t nv e h S Qu H L 1 S0 AB C u... ...u M0 1 Jhr q. d 0 mNo. 240.964. Patented IVIay 3,1881.

www QM liz NTTE STATES PATENT OEEIcE.

JOHN M. CASE, OF COLUMBUS, OHIO, ASSIGNOR TO CASE MANUFACTURING COMPANY,oF

FLOUR- SAME PLACE.

BOLT.

SPECIFICATION forming part of Letters Patent No. 240,964, dated May 3,1881.

Application filed October 20, 1880.

To all whom it may concern:

Be it known that I, JOHN M. CASE, a citizen ot the United States,residing at Columbus, in the county ot' Franklin and State of Ohio, I

have invented Imlnovements in Flour-Bolts,

of which the following is a specification.

The subject of my invention is an apparatus consisting of an inclinedbox, or a number of such boxes in a vertical series, one over another,

1o each being preferably mounted at its delivery end on a driving-shat't, and supported adjustably at the other end so as to be variablein its angle of inclination. Each box contains a screen and an endlesselevatordriven by a positive movement, by which the material passingthrough the screen is repeatedly raised and dropped upon its upper endfor rescreening, a series of guides being arranged at the upper end ofthe screen, adjustable at any angle, in

zo such a manner as to deflect the material as it is dropped on theupper end ofthe screen, more or less, from the receiving toward thedischarging side ofthe screen, so as to accelerate or retard its passagethrough the machine, as hereinafter described. The endlesselevatorcarrics a brush for sweeping the upper surface of the screen.rlhe screen has a slight vibratory motion, and has beneath it a seriesof parallel wires carried by the screen in its vibrations, and serv- 3oing to impart an additional vertical vibration to the cloth by their owntremulous motion, the said wires being mounted in a frame which has avery slow reciprocating movement parallel with and independentlyot' thescreen, said 3 5 movement extending as far as the distance between thewires, so that all parts of the surface of the screen will be subjectedto the vibrating action of the wires. The material passing through thescreen is delivered into a 4o trough provided with an adjustablecut-ofi', with conveyers above and below, so that any desired proportionof the product may be discharged for use, and the remainder carried backas returns for retreatment.

In order that my invention may be fully understood, I will proceed todescribe it with reference to the accompanying drawings, in which-Figure lisa side elevation, partly in section, 5o illustrating theinvention embodied in a verti- (Model.)

cal series of three boxes, the upper box and its accessories being shownentirely in section, the middle box one-halt in section, and the lowerbox in elevation. Fig. 2 is a plan view with the cover ofthe boxomitted. Fig. 3 is an end 55 view, the top ofthe box beingl sectionalvertically on the line 3 3, Fig. 1. Fig. et is a transverse section ot'one ot' the boxes on the line 4 4, Fig. l.

A A A represent different parts of the sta- 6o tionary frame.

B B B are inclined boxes, supported at one end on driving-shafts C,having their bearings in brackets D, and supported adj ustably at theother end by brackets E,projectingrigidlyfrom the frame A, andscrew-clamps F, txed to the side ofthe box and sliding on the saidbrackets E, as illustrated in Fig. l. Tithin each box is a screen, G,fitted to slide, and having a slight vibratoryinot-ion imparted to it bymeans 7o of a cam or tappet-wheel, H, or any other customary means.

I I represent a series of wires mounted in a frame, l', which is carriedby the screen, and receiving a gradual reciprocating movement by 7 5means of a screw, the said movement extending to about the distancebetweenl the wires -I so that they will be brought under all parts ofthe screen in succession, as described in my pending application forimprovement in mid- 8o dlings-puriiiers. The motion ofthe screen uponthese wires keeps the material on the screen constantly in motion, andprevents the clogging ot' the same on either the upper or lower side ofthe screen.

The endless elevator consists of an apron, K, attached to bars L, whichare carried by endless chains M, driven by sprocket-wheels N on a shaft,O, at the lower end of the box, the said chains being stretched aroundsimilar 9o sprocket-wheels, P, 011 an idle-shaft, P', at the upper end.One or more brushes, Z, are attached to the outer side of the elevatorfor the purposeofsweepingthescreen. Thesebrushes may be made of leatherthongs, rope, bristles, 95 or any material preferred. My preference isto make them ot' small cords adapted to fall freely upon and be drawnover the surface of the screen.

Q Q represent con veyers, placed respectivei 0o ly above and below aeut-oi chute, It, upon which the screened material is delivered from thescreen-board S.

R represents a cut-off valve adjustable longitudinally ot' theconveyers, so as to cause a greater or less quantity of the screenedmaterial at the tail end of the box to be dropped into the lowerconveyer, Q, in order to be carried back with the returns.

The conveyer Q and the driving-shaft 0 of the sprocket-wheels N aredriven, respectively, by pinions T2 T3, connected by means of anidlewheel, T, and pinion T2, meshing with a pinion, T, on thedriving-shaft C. The tappet or cam Wheel H, as shown, is carried by theshat't of the upper conveyer, Q 5 but these details are not important tothe invention.

U U represent customary sprin g-han gers, by which the screen G issupported and permitted to vibrate.

V represents the t'eedinghopper; \V, the tailings-spout; X, thedelivery-spout for the finished material, and Y the returns-spout, whichis shown in the present illustration conducting the material, which,passing through the side of the screen most remote from thefeedinghopper V, is delivered to the lower conductor, Q', into the nextbox below for rebolting. If preferred, these returns may be carried backagain to the iirst hopper for rescreening or to the stones forregrinding, and the fine product passing through the first side ot' thescreen may be taken into the feedinghopper of the next bolt, ifit bedesired to rebolt the flour. My invention is applicable under eithermode ot' treatment.

G' G are guides or detlectors pivoted at the upper end of the screen Gr,and adjustable at any angle by means of a connecting-rod, g, so that thesaid guides may be turned at any angle desired, in order to deflect thematerial toward the discharging side ot' the box, tc a greater or lessextent.

In operation the material received through the feeding-hopper V iscarried up by the elevator K L and dropped on the upper end of theinclined screen G. lt descends over the surface of the said screen incustomary manner, the finished portions passing through the meshes, andthat which reaches the bottom without passing through is taken by theelevator and carried successively to the upper end. The deccting-guidesG serve to gradually convey the material at each successive elevation toa greater or less distance from the receivin g toward the delivery sideof the screen,

so that by the adjustment of the said deflectv ing-guides it may becaused to be elevated and passed over the screen any desirable numberot' times before it will reach the side ot' the screen most remote fromthe feed, and such as cannot pass through will be discharged as tailingsthrough the spout WV.

By making a small modification of my bolt as herein described, it may beused as a purifier for cleaning middlin gs, or as a combined bolt andpurifier. This modification consists in forming an angular space betweenthe screen G and elevator K L, by widening out the elevated end of themachine and throwing the elevator upon a greater angle than the screen.Into this angular cavity there may be a suction of air applied by theconstruction of suitable fans having connection with the air-chambersabove the screens. The object in pivoting the bolts so as to permit agreater or less angle of inclination is to increase or retard the motionof the material upon the screen butI do not contine myself to pivotingthe succes sive bolts and building each independent, as hereindescribed, as they may be made permanent and the series of bolts allcombined in one vertical bolting-chest.

Having thus described my invention, the following is what I claim as newtherein and desire to secure by Letters Patent:

The combination of trunk or box B, the sprocket-wheels N P, endlessapron K, provided with bars L, chains M, and a screen, G, as set forth.

2. The combination, with the elevator-trunk, screen, andsprocket-wheels, of the endless apron K, provided with bars L andcleaningbrush Z, as set forth.

3. A bolting apparatus consisting of a vertical series of inclined boxescontaining elevators and screens, and provided with conduct ing spoutsor hoppers, to pass the materia-l from one to another of the successiveboxes ot' the series, as explained.

4. The box or trunk B, containing the elevator and screen, said boxbeing hinged at its lower end and adjustable at its upper end, as setforth.

5. The combination ot' the box or trunk B, hinged at its lower end, andcontaining clevator and screen, brackets E, supporting its upper end,and screw-cla1nps F, for adjusting the said trunk, as set forth.

6. In combination with the apron K and screen Gr, the pivoted deectorsor guides G G', arranged at head of the said screen, as set forth.

7. The tappet or notched push-wheel H, adapted to slide the screenendwisc, as herein described, for the purpose set forth.

JQHN M. CASE.

\Vitnesses:

OTWAY WA'rsoN, HARRY E. KNIGHT.

ICO

IOS

